do you think this is true or false? please explain?

Question

proper length ('own length") is measured in a frame that is at rest relative to the obejct in question. the length measured in a different frame is always shorter than the proper length

Answer 1

TRUE - At relativistic speeds things become more and more two-dimensional along the direction of motion, so they would always get smaller (than they were originally) and never get bigger. This is known as 'length contraction'.